Liebherr LTM 1090-4.1 - Manual (Page 15)

LTM 1090-4 .1
15
The slewing gear
• Liebherr planetary gearbox,
spring-loaded multi-disk brake
• Reversible open or hydraulically
locked as standard
• Slewing speed from 0 – 1.7 rpm
infinitively variable
The central greasing
• Standard central greasing device
for slewing bearing, boom bearing,
luffing cylinder and winch bearing
• Even supply of grease
• Filling quantity visible at any time
in transparent reservoir
High-power crane drive
With tried-and-tested components
The drive components for crane operation are constructed for high performance
and ensure sensitive and precise load handling. They are specially designed to
suit the crane’s usage and have been subjected to hard endurance tests.
• Crane engine: four-cylinder Liebherr turbo-diesel engine, 129 kW/175 hp,
815 Nm max. torque, optimised fuel consumption thanks to electronic engine
management
• Diesel-hydraulic crane drive, open oil circuits with electric LOAD SENSING
control, 4 simultaneous working motions possible
• Electric/electronic SPS crane control via LICCON computer system
• Slewing gear can be switched as standard: released or hydraulically locked.
The movement can thus be optimally adapted to the different operating
requirements, e.g. sensitive assembly work or rapid work cycles
• Self-manufactured Liebherr winches, 57 kN line pull at the outer layer,
greater line pull means less rope reeving is needed
LICCON
monitor
Control sensor with touch displays
Control unit
Telescoping
cylinder
Luffing
cylinder
Control block
Hoist gear Slewing gear
Gear type
pump
Variable displacement pump
Liebherr
diesel engine
Sensor